package javaCode.chapter02;

public class 变量 {

    public static void main(String[] args) {

        System.out.println(100+"39"); //10039
        System.out.println(10+1+"Hello");  //11Hello

        //java的整型常量(具体值)默认为int型 声明long型常量须后加'l'或'L'
        int a = 1;
        long b = 1L;
        System.out.println(a);
        System.out.println(b);
    }
}
